http://www.pinvoke.net/default.aspx/avifil32.AVIFileCreateStream
这个网站里面的东西很全，利用托管方式调用非托管资源，并且有详细的介绍，值得收藏。
C# Signature:
[DllImport("avifil32.dll", SetLastError=true)]
static extern int AVIFileCreateStream(int pfile, out IntPtr ppavi, ref AVISTREAMINFO psi);
VB Signature:
Declare Function AVIFileCreateStream Lib "avifil32.dll" Alias "AVIFileCreateStreamA" (ByVal pfile As Integer, ByRef ppavi As Integer, ByRef psi As AVISTREAMINFO) As Integer
User-Defined Types:
Alternative Managed API:
Do you know one? Please contribute it!
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
Please add some!
For a C# enum see WindowsMessages
Definitions / Descriptions
| WM_ACTIVATE | 0x6 | The WM_ACTIVATE message is sent when a window is being activated or deactivated. This message is sent first to the window procedure of the top-level window being deactivated; it is then sent to the window procedure of the top-level window being activated. |
| WM_ACTIVATEAPP | 0x1C | The WM_ACTIVATEAPP message is sent when a window belonging to a different application than the active window is about to be activated. The message is sent to the application whose window is being activated and to the application whose window is being deactivated. |
| WM_AFXFIRST | 0x360 | The WM_AFXFIRST specifies the first afx message. |
| WM_AFXLAST | 0x37F | The WM_AFXFIRST specifies the last afx message. |
| WM_APP | 0x8000 | The WM_APP constant is used by applications to help define private messages, usually of the form WM_APP+X, where X is an integer value. |
| WM_ASKCBFORMATNAME | 0x30C | The WM_ASKCBFORMATNAME message is sent to the clipboard owner by a clipboard viewer window to request the name of a CF_OWNERDISPLAY clipboard format. |
| WM_CANCELJOURNAL | 0x4B | The WM_CANCELJOURNAL message is posted to an application when a user cancels the application's journaling activities. The message is posted with a NULL window handle. |
| WM_CANCELMODE | 0x1F | The WM_CANCELMODE message is sent to cancel certain modes, such as mouse capture. For example, the system sends this message to the active window when a dialog box or message box is displayed. Certain functions also send this message explicitly to the specified window regardless of whether it is the active window. For example, the EnableWindow function sends this message when disabling the specified window. |
| WM_CAPTURECHANGED | 0x215 | The WM_CAPTURECHANGED message is sent to the window that is losing the mouse capture. |
| WM_CHANGECBCHAIN | 0x30D | The WM_CHANGECBCHAIN message is sent to the first window in the clipboard viewer chain when a window is being removed from the chain. |
| WM_CHANGEUISTATE | 0x127 | An application sends the WM_CHANGEUISTATE message to indicate that the user interface (UI) state should be changed. |
| WM_CHAR | 0x102 | The WM_CHAR message is posted to the window with the keyboard focus when a WM_KEYDOWN message is translated by the TranslateMessage function. The WM_CHAR message contains the character code of the key that was pressed. |
| WM_CHARTOITEM | 0x2F | Sent by a list box with the LBS_WANTKEYBOARDINPUT style to its owner in response to a WM_CHAR message. |
| WM_CHILDACTIVATE | 0x22 | The WM_CHILDACTIVATE message is sent to a child window when the user clicks the window's title bar or when the window is activated, moved, or sized. |
| WM_CLEAR | 0x303 | An application sends a WM_CLEAR message to an edit control or combo box to delete (clear) the current selection, if any, from the edit control. |
| WM_CLOSE | 0x10 | The WM_CLOSE message is sent as a signal that a window or an application should terminate. |
| WM_COMMAND | 0x111 | The WM_COMMAND message is sent when the user selects a command item from a menu, when a control sends a notification message to its parent window, or when an accelerator keystroke is translated. |
| WM_COMPACTING | 0x41 | The WM_COMPACTING message is sent to all top-level windows when the system detects more than 12.5 percent of system time over a 30- to 60-second interval is being spent compacting memory. This indicates that system memory is low. |
| WM_COMPAREITEM | 0x39 | The system sends the WM_COMPAREITEM message to determine the relative position of a new item in the sorted list of an owner-drawn combo box or list box. Whenever the application adds a new item, the system sends this message to the owner of a combo box or list box created with the CBS_SORT or LBS_SORT style. |
| WM_CONTEXTMENU | 0x7B | The WM_CONTEXTMENU message notifies a window that the user clicked the right mouse button (right-clicked) in the window. |
| WM_COPY | 0x301 | An application sends the WM_COPY message to an edit control or combo box to copy the current selection to the clipboard in CF_TEXT format. |
| WM_COPYDATA | 0x4A | An application sends the WM_COPYDATA message to pass data to another application. |
| WM_CREATE | 0x1 | The WM_CREATE message is sent when an application requests that a window be created by calling the CreateWindowEx or CreateWindow function. (The message is sent before the function returns.) The window procedure of the new window receives this message after the window is created, but before the window becomes visible. |
| WM_CTLCOLORBTN | 0x135 | The WM_CTLCOLORBTN message is sent to the parent window of a button before drawing the button. The parent window can change the button's text and background colors. However, only owner-drawn buttons respond to the parent window processing this message. |
| WM_CTLCOLORDLG | 0x136 | The WM_CTLCOLORDLG message is sent to a dialog box before the system draws the dialog box. By responding to this message, the dialog box can set its text and background colors using the specified display device context handle. |
| WM_CTLCOLOREDIT | 0x133 | An edit control that is not read-only or disabled sends the WM_CTLCOLOREDIT message to its parent window when the control is about to be drawn. By responding to this message, the parent window can use the specified device context handle to set the text and background colors of the edit control. |
| WM_CTLCOLORLISTBOX | 0x134 | Sent to the parent window of a list box before the system draws the list box. By responding to this message, the parent window can set the text and background colors of the list box by using the specified display device context handle. |
| WM_CTLCOLORMSGBOX | 0x132 | The WM_CTLCOLORMSGBOX message is sent to the owner window of a message box before Windows draws the message box. By responding to this message, the owner window can set the text and background colors of the message box by using the given display device context handle. |
| WM_CTLCOLORSCROLLBAR | 0x137 | The WM_CTLCOLORSCROLLBAR message is sent to the parent window of a scroll bar control when the control is about to be drawn. By responding to this message, the parent window can use the display context handle to set the background color of the scroll bar control. |
| WM_CTLCOLORSTATIC | 0x138 | A static control, or an edit control that is read-only or disabled, sends the WM_CTLCOLORSTATIC message to its parent window when the control is about to be drawn. By responding to this message, the parent window can use the specified device context handle to set the text and background colors of the static control. |
| WM_CUT | 0x300 | An application sends a WM_CUT message to an edit control or combo box to delete (cut) the current selection, if any, in the edit control and copy the deleted text to the clipboard in CF_TEXT format. |
| WM_DEADCHAR | 0x103 | The WM_DEADCHAR message is posted to the window with the keyboard focus when a WM_KEYUP message is translated by the TranslateMessage function. WM_DEADCHAR specifies a character code generated by a dead key. A dead key is a key that generates a character, such as the umlaut (double-dot), that is combined with another character to form a composite character. For example, the umlaut-O character (Ö) is generated by typing the dead key for the umlaut character, and then typing the O key. |
| WM_DELETEITEM | 0x2D | Sent to the owner of a list box or combo box when the list box or combo box is destroyed or when items are removed by the LB_DELETESTRING, LB_RESETCONTENT, CB_DELETESTRING, or CB_RESETCONTENT message. The system sends a WM_DELETEITEM message for each deleted item. The system sends the WM_DELETEITEM message for any deleted list box or combo box item with nonzero item data. |
| WM_DESTROY | 0x2 | The WM_DESTROY message is sent when a window is being destroyed. It is sent to the window procedure of the window being destroyed after the window is removed from the screen. This message is sent first to the window being destroyed and then to the child windows (if any) as they are destroyed. During the processing of the message, it can be assumed that all child windows still exist. |
| WM_DESTROYCLIPBOARD | 0x307 | The WM_DESTROYCLIPBOARD message is sent to the clipboard owner when a call to the EmptyClipboard function empties the clipboard. |
| WM_DEVICECHANGE | 0x219 | Notifies an application of a change to the hardware configuration of a device or the computer. |
| WM_DEVMODECHANGE | 0x1B | The WM_DEVMODECHANGE message is sent to all top-level windows whenever the user changes device-mode settings. |
| WM_DISPLAYCHANGE | 0x7E | The WM_DISPLAYCHANGE message is sent to all windows when the display resolution has changed. |
| WM_DRAWCLIPBOARD | 0x308 | The WM_DRAWCLIPBOARD message is sent to the first window in the clipboard viewer chain when the content of the clipboard changes. This enables a clipboard viewer window to display the new content of the clipboard. |
| WM_DRAWITEM | 0x2B | The WM_DRAWITEM message is sent to the parent window of an owner-drawn button, combo box, list box, or menu when a visual aspect of the button, combo box, list box, or menu has changed. |
| WM_DROPFILES | 0x233 | Sent when the user drops a file on the window of an application that has registered itself as a recipient of dropped files. |
| WM_ENABLE | 0xA | The WM_ENABLE message is sent when an application changes the enabled state of a window. It is sent to the window whose enabled state is changing. This message is sent before the EnableWindow function returns, but after the enabled state (WS_DISABLED style bit) of the window has changed. |
| WM_ENDSESSION | 0x16 | The WM_ENDSESSION message is sent to an application after the system processes the results of the WM_QUERYENDSESSION message. The WM_ENDSESSION message informs the application whether the session is ending. |
| WM_ENTERIDLE | 0x121 | The WM_ENTERIDLE message is sent to the owner window of a modal dialog box or menu that is entering an idle state. A modal dialog box or menu enters an idle state when no messages are waiting in its queue after it has processed one or more previous messages. |
| WM_ENTERMENULOOP | 0x211 | The WM_ENTERMENULOOP message informs an application's main window procedure that a menu modal loop has been entered. |
| WM_ENTERSIZEMOVE | 0x231 | The WM_ENTERSIZEMOVE message is sent one time to a window after it enters the moving or sizing modal loop. The window enters the moving or sizing modal loop when the user clicks the window's title bar or sizing border, or when the window passes the WM_SYSCOMMAND message to the DefWindowProc function and the wParam parameter of the message specifies the SC_MOVE or SC_SIZE value. The operation is complete when DefWindowProc returns. |
| WM_ERASEBKGND | 0x14 | The WM_ERASEBKGND message is sent when the window background must be erased (for example, when a window is resized). The message is sent to prepare an invalidated portion of a window for painting. |
| WM_EXITMENULOOP | 0x212 | The WM_EXITMENULOOP message informs an application's main window procedure that a menu modal loop has been exited. |
| WM_EXITSIZEMOVE | 0x232 | The WM_EXITSIZEMOVE message is sent one time to a window, after it has exited the moving or sizing modal loop. The window enters the moving or sizing modal loop when the user clicks the window's title bar or sizing border, or when the window passes the WM_SYSCOMMAND message to the DefWindowProc function and the wParam parameter of the message specifies the SC_MOVE or SC_SIZE value. The operation is complete when DefWindowProc returns. |
| WM_FONTCHANGE | 0x1D | An application sends the WM_FONTCHANGE message to all top-level windows in the system after changing the pool of font resources. |
| WM_GETDLGCODE | 0x87 | The WM_GETDLGCODE message is sent to the window procedure associated with a control. By default, the system handles all keyboard input to the control; the system interprets certain types of keyboard input as dialog box navigation keys. To override this default behavior, the control can respond to the WM_GETDLGCODE message to indicate the types of input it wants to process itself. |
| WM_GETFONT | 0x31 | An application sends a WM_GETFONT message to a control to retrieve the font with which the control is currently drawing its text. |
| WM_GETHOTKEY | 0x33 | An application sends a WM_GETHOTKEY message to determine the hot key associated with a window. |
| WM_GETICON | 0x7F | The WM_GETICON message is sent to a window to retrieve a handle to the large or small icon associated with a window. The system displays the large icon in the ALT+TAB dialog, and the small icon in the window caption. |
| WM_GETMINMAXINFO | 0x24 | The WM_GETMINMAXINFO message is sent to a window when the size or position of the window is about to change. An application can use this message to override the window's default maximized size and position, or its default minimum or maximum tracking size. |
| WM_GETOBJECT | 0x3D | Active Accessibility sends the WM_GETOBJECT message to obtain information about an accessible object contained in a server application. Applications never send this message directly. It is sent only by Active Accessibility in response to calls to AccessibleObjectFromPoint, AccessibleObjectFromEvent, or AccessibleObjectFromWindow. However, server applications handle this message. |
| WM_GETTEXT | 0xD | An application sends a WM_GETTEXT message to copy the text that corresponds to a window into a buffer provided by the caller. |
| WM_GETTEXTLENGTH | 0xE | An application sends a WM_GETTEXTLENGTH message to determine the length, in characters, of the text associated with a window. |
| WM_HANDHELDFIRST | 0x358 | Definition Needed |
| WM_HANDHELDLAST | 0x35F | Definition Needed |
| WM_HELP | 0x53 | Indicates that the user pressed the F1 key. If a menu is active when F1 is pressed, WM_HELP is sent to the window associated with the menu; otherwise, WM_HELP is sent to the window that has the keyboard focus. If no window has the keyboard focus, WM_HELP is sent to the currently active window. |
| WM_HOTKEY | 0x312 | The WM_HOTKEY message is posted when the user presses a hot key registered by the RegisterHotKey function. The message is placed at the top of the message queue associated with the thread that registered the hot key. |
| WM_HSCROLL | 0x114 | This message is sent to a window when a scroll event occurs in the window's standard horizontal scroll bar. This message is also sent to the owner of a horizontal scroll bar control when a scroll event occurs in the control. |
| WM_HSCROLLCLIPBOARD | 0x30E | The WM_HSCROLLCLIPBOARD message is sent to the clipboard owner by a clipboard viewer window. This occurs when the clipboard contains data in the CF_OWNERDISPLAY format and an event occurs in the clipboard viewer's horizontal scroll bar. The owner should scroll the clipboard image and update the scroll bar values. |
| WM_ICONERASEBKGND | 0x27 | Windows NT 3.51 and earlier: The WM_ICONERASEBKGND message is sent to a minimized window when the background of the icon must be filled before painting the icon. A window receives this message only if a class icon is defined for the window; otherwise, WM_ERASEBKGND is sent. This message is not sent by newer versions of Windows. |
| WM_IME_CHAR | 0x286 | Sent to an application when the IME gets a character of the conversion result. A window receives this message through its WindowProc function. |
| WM_IME_COMPOSITION | 0x10F | Sent to an application when the IME changes composition status as a result of a keystroke. A window receives this message through its WindowProc function. |
| WM_IME_COMPOSITIONFULL | 0x284 | Sent to an application when the IME window finds no space to extend the area for the composition window. A window receives this message through its WindowProc function. |
| WM_IME_CONTROL | 0x283 | Sent by an application to direct the IME window to carry out the requested command. The application uses this message to control the IME window that it has created. To send this message, the application calls the SendMessage function with the following parameters. |
| WM_IME_ENDCOMPOSITION | 0x10E | Sent to an application when the IME ends composition. A window receives this message through its WindowProc function. |
| WM_IME_KEYDOWN | 0x290 | Sent to an application by the IME to notify the application of a key press and to keep message order. A window receives this message through its WindowProc function. |
| WM_IME_KEYLAST | 0x10F | Definition Needed |
| WM_IME_KEYUP | 0x291 | Sent to an application by the IME to notify the application of a key release and to keep message order. A window receives this message through its WindowProc function. |
| WM_IME_NOTIFY | 0x282 | Sent to an application to notify it of changes to the IME window. A window receives this message through its WindowProc function. |
| WM_IME_REQUEST | 0x288 | Sent to an application to provide commands and request information. A window receives this message through its WindowProc function. |
| WM_IME_SELECT | 0x285 | Sent to an application when the operating system is about to change the current IME. A window receives this message through its WindowProc function. |
| WM_IME_SETCONTEXT | 0x281 | Sent to an application when a window is activated. A window receives this message through its WindowProc function. |
| WM_IME_STARTCOMPOSITION | 0x10D | Sent immediately before the IME generates the composition string as a result of a keystroke. A window receives this message through its WindowProc function. |
| WM_INITDIALOG | 0x110 | The WM_INITDIALOG message is sent to the dialog box procedure immediately before a dialog box is displayed. Dialog box procedures typically use this message to initialize controls and carry out any other initialization tasks that affect the appearance of the dialog box. |
| WM_INITMENU | 0x116 | The WM_INITMENU message is sent when a menu is about to become active. It occurs when the user clicks an item on the menu bar or presses a menu key. This allows the application to modify the menu before it is displayed. |
| WM_INITMENUPOPUP | 0x117 | The WM_INITMENUPOPUP message is sent when a drop-down menu or submenu is about to become active. This allows an application to modify the menu before it is displayed, without changing the entire menu. |
| WM_INPUTLANGCHANGE | 0x51 | The WM_INPUTLANGCHANGE message is sent to the topmost affected window after an application's input language has been changed. You should make any application-specific settings and pass the message to the DefWindowProc function, which passes the message to all first-level child windows. These child windows can pass the message to DefWindowProc to have it pass the message to their child windows, and so on. |
| WM_INPUTLANGCHANGEREQUEST | 0x50 | The WM_INPUTLANGCHANGEREQUEST message is posted to the window with the focus when the user chooses a new input language, either with the hotkey (specified in the Keyboard control panel application) or from the indicator on the system taskbar. An application can accept the change by passing the message to the DefWindowProc function or reject the change (and prevent it from taking place) by returning immediately. |
| WM_KEYDOWN | 0x100 | The WM_KEYDOWN message is posted to the window with the keyboard focus when a nonsystem key is pressed. A nonsystem key is a key that is pressed when the ALT key is not pressed. |
| WM_KEYFIRST | 0x100 | This message filters for keyboard messages. |
| WM_KEYLAST | 0x108 | This message filters for keyboard messages. |
| WM_KEYUP | 0x101 | The WM_KEYUP message is posted to the window with the keyboard focus when a nonsystem key is released. A nonsystem key is a key that is pressed when the ALT key is not pressed, or a keyboard key that is pressed when a window has the keyboard focus. |
| WM_KILLFOCUS | 0x8 | The WM_KILLFOCUS message is sent to a window immediately before it loses the keyboard focus. |
| WM_LBUTTONDBLCLK | 0x203 | The WM_LBUTTONDBLCLK message is posted when the user double-clicks the left mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_LBUTTONDOWN | 0x201 | The WM_LBUTTONDOWN message is posted when the user presses the left mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_LBUTTONUP | 0x202 | The WM_LBUTTONUP message is posted when the user releases the left mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_MBUTTONDBLCLK | 0x209 | The WM_MBUTTONDBLCLK message is posted when the user double-clicks the middle mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_MBUTTONDOWN | 0x207 | The WM_MBUTTONDOWN message is posted when the user presses the middle mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_MBUTTONUP | 0x208 | The WM_MBUTTONUP message is posted when the user releases the middle mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_MDIACTIVATE | 0x222 | An application sends the WM_MDIACTIVATE message to a multiple-document interface (MDI) client window to instruct the client window to activate a different MDI child window. |
| WM_MDICASCADE | 0x227 | An application sends the WM_MDICASCADE message to a multiple-document interface (MDI) client window to arrange all its child windows in a cascade format. |
| WM_MDICREATE | 0x220 | An application sends the WM_MDICREATE message to a multiple-document interface (MDI) client window to create an MDI child window. |
| WM_MDIDESTROY | 0x221 | An application sends the WM_MDIDESTROY message to a multiple-document interface (MDI) client window to close an MDI child window. |
| WM_MDIGETACTIVE | 0x229 | An application sends the WM_MDIGETACTIVE message to a multiple-document interface (MDI) client window to retrieve the handle to the active MDI child window. |
| WM_MDIICONARRANGE | 0x228 | An application sends the WM_MDIICONARRANGE message to a multiple-document interface (MDI) client window to arrange all minimized MDI child windows. It does not affect child windows that are not minimized. |
| WM_MDIMAXIMIZE | 0x225 | An application sends the WM_MDIMAXIMIZE message to a multiple-document interface (MDI) client window to maximize an MDI child window. The system resizes the child window to make its client area fill the client window. The system places the child window's window menu icon in the rightmost position of the frame window's menu bar, and places the child window's restore icon in the leftmost position. The system also appends the title bar text of the child window to that of the frame window. |
| WM_MDINEXT | 0x224 | An application sends the WM_MDINEXT message to a multiple-document interface (MDI) client window to activate the next or previous child window. |
| WM_MDIREFRESHMENU | 0x234 | An application sends the WM_MDIREFRESHMENU message to a multiple-document interface (MDI) client window to refresh the window menu of the MDI frame window. |
| WM_MDIRESTORE | 0x223 | An application sends the WM_MDIRESTORE message to a multiple-document interface (MDI) client window to restore an MDI child window from maximized or minimized size. |
| WM_MDISETMENU | 0x230 | An application sends the WM_MDISETMENU message to a multiple-document interface (MDI) client window to replace the entire menu of an MDI frame window, to replace the window menu of the frame window, or both. |
| WM_MDITILE | 0x226 | An application sends the WM_MDITILE message to a multiple-document interface (MDI) client window to arrange all of its MDI child windows in a tile format. |
| WM_MEASUREITEM | 0x2C | The WM_MEASUREITEM message is sent to the owner window of a combo box, list box, list view control, or menu item when the control or menu is created. |
| WM_MENUCHAR | 0x120 | The WM_MENUCHAR message is sent when a menu is active and the user presses a key that does not correspond to any mnemonic or accelerator key. This message is sent to the window that owns the menu. |
| WM_MENUCOMMAND | 0x126 | The WM_MENUCOMMAND message is sent when the user makes a selection from a menu. |
| WM_MENUDRAG | 0x123 | The WM_MENUDRAG message is sent to the owner of a drag-and-drop menu when the user drags a menu item. |
| WM_MENUGETOBJECT | 0x124 | The WM_MENUGETOBJECT message is sent to the owner of a drag-and-drop menu when the mouse cursor enters a menu item or moves from the center of the item to the top or bottom of the item. |
| WM_MENURBUTTONUP | 0x122 | The WM_MENURBUTTONUP message is sent when the user releases the right mouse button while the cursor is on a menu item. |
| WM_MENUSELECT | 0x11F | The WM_MENUSELECT message is sent to a menu's owner window when the user selects a menu item. |
| WM_MOUSEACTIVATE | 0x21 | The WM_MOUSEACTIVATE message is sent when the cursor is in an inactive window and the user presses a mouse button. The parent window receives this message only if the child window passes it to the DefWindowProc function. |
| WM_MOUSEFIRST | 0x200 | Use WM_MOUSEFIRST to specify the first mouse message. Use the PeekMessage() Function. |
| WM_MOUSEHOVER | 0x2A1 | The WM_MOUSEHOVER message is posted to a window when the cursor hovers over the client area of the window for the period of time specified in a prior call to TrackMouseEvent. |
| WM_MOUSELAST | 0x20D | Definition Needed |
| WM_MOUSELEAVE | 0x2A3 | The WM_MOUSELEAVE message is posted to a window when the cursor leaves the client area of the window specified in a prior call to TrackMouseEvent. |
| WM_MOUSEMOVE | 0x200 | The WM_MOUSEMOVE message is posted to a window when the cursor moves. If the mouse is not captured, the message is posted to the window that contains the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_MOUSEWHEEL | 0x20A | The WM_MOUSEWHEEL message is sent to the focus window when the mouse wheel is rotated. The DefWindowProc function propagates the message to the window's parent. There should be no internal forwarding of the message, since DefWindowProc propagates it up the parent chain until it finds a window that processes it. |
| WM_MOUSEHWHEEL | 0x20E | The WM_MOUSEHWHEEL message is sent to the focus window when the mouse's horizontal scroll wheel is tilted or rotated. The DefWindowProc function propagates the message to the window's parent. There should be no internal forwarding of the message, since DefWindowProc propagates it up the parent chain until it finds a window that processes it. |
| WM_MOVE | 0x3 | The WM_MOVE message is sent after a window has been moved. |
| WM_MOVING | 0x216 | The WM_MOVING message is sent to a window that the user is moving. By processing this message, an application can monitor the position of the drag rectangle and, if needed, change its position. |
| WM_NCACTIVATE | 0x86 | Non Client Area Activated Caption(Title) of the Form |
| WM_NCCALCSIZE | 0x83 | The WM_NCCALCSIZE message is sent when the size and position of a window's client area must be calculated. By processing this message, an application can control the content of the window's client area when the size or position of the window changes. |
| WM_NCCREATE | 0x81 | The WM_NCCREATE message is sent prior to the WM_CREATE message when a window is first created. |
| WM_NCDESTROY | 0x82 | The WM_NCDESTROY message informs a window that its nonclient area is being destroyed. The DestroyWindow function sends the WM_NCDESTROY message to the window following the WM_DESTROY message. WM_DESTROY is used to free the allocated memory object associated with the window. |
| WM_NCHITTEST | 0x84 | The WM_NCHITTEST message is sent to a window when the cursor moves, or when a mouse button is pressed or released. If the mouse is not captured, the message is sent to the window beneath the cursor. Otherwise, the message is sent to the window that has captured the mouse. |
| WM_NCLBUTTONDBLCLK | 0xA3 | The WM_NCLBUTTONDBLCLK message is posted when the user double-clicks the left mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCLBUTTONDOWN | 0xA1 | The WM_NCLBUTTONDOWN message is posted when the user presses the left mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCLBUTTONUP | 0xA2 | The WM_NCLBUTTONUP message is posted when the user releases the left mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCMBUTTONDBLCLK | 0xA9 | The WM_NCMBUTTONDBLCLK message is posted when the user double-clicks the middle mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCMBUTTONDOWN | 0xA7 | The WM_NCMBUTTONDOWN message is posted when the user presses the middle mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCMBUTTONUP | 0xA8 | The WM_NCMBUTTONUP message is posted when the user releases the middle mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCMOUSEMOVE | 0xA0 | The WM_NCMOUSEMOVE message is posted to a window when the cursor is moved within the nonclient area of the window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCPAINT | 0x85 | The WM_NCPAINT message is sent to a window when its frame must be painted. |
| WM_NCRBUTTONDBLCLK | 0xA6 | The WM_NCRBUTTONDBLCLK message is posted when the user double-clicks the right mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCRBUTTONDOWN | 0xA4 | The WM_NCRBUTTONDOWN message is posted when the user presses the right mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NCRBUTTONUP | 0xA5 | The WM_NCRBUTTONUP message is posted when the user releases the right mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted. |
| WM_NEXTDLGCTL | 0x28 | The WM_NEXTDLGCTL message is sent to a dialog box procedure to set the keyboard focus to a different control in the dialog box |
| WM_NEXTMENU | 0x213 | The WM_NEXTMENU message is sent to an application when the right or left arrow key is used to switch between the menu bar and the system menu. |
| WM_NOTIFY | 0x4E | Sent by a common control to its parent window when an event has occurred or the control requires some information. |
| WM_NOTIFYFORMAT | 0x55 | Determines if a window accepts ANSI or Unicode structures in the WM_NOTIFY notification message. WM_NOTIFYFORMAT messages are sent from a common control to its parent window and from the parent window to the common control. |
| WM_NULL | 0x0 | The WM_NULL message performs no operation. An application sends the WM_NULL message if it wants to post a message that the recipient window will ignore. |
| WM_PAINT | 0xF | Occurs when the control needs repainting |
| WM_PAINTCLIPBOARD | 0x309 | The WM_PAINTCLIPBOARD message is sent to the clipboard owner by a clipboard viewer window when the clipboard contains data in the CF_OWNERDISPLAY format and the clipboard viewer's client area needs repainting. |
| WM_PAINTICON | 0x26 | Windows NT 3.51 and earlier: The WM_PAINTICON message is sent to a minimized window when the icon is to be painted. This message is not sent by newer versions of Microsoft Windows, except in unusual circumstances explained in the Remarks. |
| WM_PALETTECHANGED | 0x311 | This message is sent by the OS to all top-level and overlapped windows after the window with the keyboard focus realizes its logical palette. This message enables windows that do not have the keyboard focus to realize their logical palettes and update their client areas. |
| WM_PALETTEISCHANGING | 0x310 | The WM_PALETTEISCHANGING message informs applications that an application is going to realize its logical palette. |
| WM_PARENTNOTIFY | 0x210 | The WM_PARENTNOTIFY message is sent to the parent of a child window when the child window is created or destroyed, or when the user clicks a mouse button while the cursor is over the child window. When the child window is being created, the system sends WM_PARENTNOTIFY just before the CreateWindow or CreateWindowEx function that creates the window returns. When the child window is being destroyed, the system sends the message before any processing to destroy the window takes place. |
| WM_PASTE | 0x302 | An application sends a WM_PASTE message to an edit control or combo box to copy the current content of the clipboard to the edit control at the current caret position. Data is inserted only if the clipboard contains data in CF_TEXT format. |
| WM_PENWINFIRST | 0x380 | Definition Needed |
| WM_PENWINLAST | 0x38F | Definition Needed |
| WM_POWER | 0x48 | Notifies applications that the system, typically a battery-powered personal computer, is about to enter a suspended mode. Obsolete : use POWERBROADCAST instead |
| WM_POWERBROADCAST | 0x218 | Notifies applications that a power-management event has occurred. |
| WM_PRINT | 0x317 | The WM_PRINT message is sent to a window to request that it draw itself in the specified device context, most commonly in a printer device context. |
| WM_PRINTCLIENT | 0x318 | The WM_PRINTCLIENT message is sent to a window to request that it draw its client area in the specified device context, most commonly in a printer device context. |
| WM_QUERYDRAGICON | 0x37 | The WM_QUERYDRAGICON message is sent to a minimized (iconic) window. The window is about to be dragged by the user but does not have an icon defined for its class. An application can return a handle to an icon or cursor. The system displays this cursor or icon while the user drags the icon. |
| WM_QUERYENDSESSION | 0x11 | The WM_QUERYENDSESSION message is sent when the user chooses to end the session or when an application calls one of the system shutdown functions. If any application returns zero, the session is not ended. The system stops sending WM_QUERYENDSESSION messages as soon as one application returns zero. After processing this message, the system sends the WM_ENDSESSION message with the wParam parameter set to the results of the WM_QUERYENDSESSION message. |
| WM_QUERYNEWPALETTE | 0x30F | This message informs a window that it is about to receive the keyboard focus, giving the window the opportunity to realize its logical palette when it receives the focus. |
| WM_QUERYOPEN | 0x13 | The WM_QUERYOPEN message is sent to an icon when the user requests that the window be restored to its previous size and position. |
| WM_QUEUESYNC | 0x23 | The WM_QUEUESYNC message is sent by a computer-based training (CBT) application to separate user-input messages from other messages sent through the WH_JOURNALPLAYBACK Hook procedure. |
| WM_QUIT | 0x12 | Once received, it ends the application's Message Loop, signaling the application to end. It can be sent by pressing Alt+F4, Clicking the X in the upper right-hand of the program, or going to File->Exit. |
| WM_RBUTTONDBLCLK | 0x206 | he WM_RBUTTONDBLCLK message is posted when the user double-clicks the right mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_RBUTTONDOWN | 0x204 | The WM_RBUTTONDOWN message is posted when the user presses the right mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_RBUTTONUP | 0x205 | The WM_RBUTTONUP message is posted when the user releases the right mouse button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_RENDERALLFORMATS | 0x306 | The WM_RENDERALLFORMATS message is sent to the clipboard owner before it is destroyed, if the clipboard owner has delayed rendering one or more clipboard formats. For the content of the clipboard to remain available to other applications, the clipboard owner must render data in all the formats it is capable of generating, and place the data on the clipboard by calling the SetClipboardData function. |
| WM_RENDERFORMAT | 0x305 | The WM_RENDERFORMAT message is sent to the clipboard owner if it has delayed rendering a specific clipboard format and if an application has requested data in that format. The clipboard owner must render data in the specified format and place it on the clipboard by calling the SetClipboardData function. |
| WM_SETCURSOR | 0x20 | The WM_SETCURSOR message is sent to a window if the mouse causes the cursor to move within a window and mouse input is not captured. |
| WM_SETFOCUS | 0x7 | When the controll got the focus |
| WM_SETFONT | 0x30 | An application sends a WM_SETFONT message to specify the font that a control is to use when drawing text. |
| WM_SETHOTKEY | 0x32 | An application sends a WM_SETHOTKEY message to a window to associate a hot key with the window. When the user presses the hot key, the system activates the window. |
| WM_SETICON | 0x80 | An application sends the WM_SETICON message to associate a new large or small icon with a window. The system displays the large icon in the ALT+TAB dialog box, and the small icon in the window caption. |
| WM_SETREDRAW | 0xB | An application sends the WM_SETREDRAW message to a window to allow changes in that window to be redrawn or to prevent changes in that window from being redrawn. |
| WM_SETTEXT | 0xC | Text / Caption changed on the control. An application sends a WM_SETTEXT message to set the text of a window. |
| WM_SETTINGCHANGE | 0x1A | An application sends the WM_SETTINGCHANGE message to all top-level windows after making a change to the WIN.INI file. The SystemParametersInfo function sends this message after an application uses the function to change a setting in WIN.INI. |
| WM_SHOWWINDOW | 0x18 | The WM_SHOWWINDOW message is sent to a window when the window is about to be hidden or shown |
| WM_SIZE | 0x5 | The WM_SIZE message is sent to a window after its size has changed. |
| WM_SIZECLIPBOARD | 0x30B | The WM_SIZECLIPBOARD message is sent to the clipboard owner by a clipboard viewer window when the clipboard contains data in the CF_OWNERDISPLAY format and the clipboard viewer's client area has changed size. |
| WM_SIZING | 0x214 | The WM_SIZING message is sent to a window that the user is resizing. By processing this message, an application can monitor the size and position of the drag rectangle and, if needed, change its size or position. |
| WM_SPOOLERSTATUS | 0x2A | The WM_SPOOLERSTATUS message is sent from Print Manager whenever a job is added to or removed from the Print Manager queue. |
| WM_STYLECHANGED | 0x7D | The WM_STYLECHANGED message is sent to a window after the SetWindowLong function has changed one or more of the window's styles. |
| WM_STYLECHANGING | 0x7C | The WM_STYLECHANGING message is sent to a window when the SetWindowLong function is about to change one or more of the window's styles. |
| WM_SYNCPAINT | 0x88 | The WM_SYNCPAINT message is used to synchronize painting while avoiding linking independent GUI threads. |
| WM_SYSCHAR | 0x106 | The WM_SYSCHAR message is posted to the window with the keyboard focus when a WM_SYSKEYDOWN message is translated by the TranslateMessage function. It specifies the character code of a system character key — that is, a character key that is pressed while the ALT key is down. |
| WM_SYSCOLORCHANGE | 0x15 | This message is sent to all top-level windows when a change is made to a system color setting. |
| WM_SYSCOMMAND | 0x112 | A window receives this message when the user chooses a command from the Window menu (formerly known as the system or control menu) or when the user chooses the maximize button, minimize button, restore button, or close button. |
| WM_SYSDEADCHAR | 0x107 | The WM_SYSDEADCHAR message is sent to the window with the keyboard focus when a WM_SYSKEYDOWN message is translated by the TranslateMessage function. WM_SYSDEADCHAR specifies the character code of a system dead key — that is, a dead key that is pressed while holding down the ALT key. |
| WM_SYSKEYDOWN | 0x104 | The WM_SYSKEYDOWN message is posted to the window with the keyboard focus when the user presses the F10 key (which activates the menu bar) or holds down the ALT key and then presses another key. It also occurs when no window currently has the keyboard focus; in this case, the WM_SYSKEYDOWN message is sent to the active window. The window that receives the message can distinguish between these two contexts by checking the context code in the lParam parameter. |
| WM_SYSKEYUP | 0x105 | The WM_SYSKEYUP message is posted to the window with the keyboard focus when the user releases a key that was pressed while the ALT key was held down. It also occurs when no window currently has the keyboard focus; in this case, the WM_SYSKEYUP message is sent to the active window. The window that receives the message can distinguish between these two contexts by checking the context code in the lParam parameter. |
| WM_TCARD | 0x52 | Sent to an application that has initiated a training card with Microsoft Windows Help. The message informs the application when the user clicks an authorable button. An application initiates a training card by specifying the HELP_TCARD command in a call to the WinHelp function. |
| WM_TIMECHANGE | 0x1E | A message that is sent whenever there is a change in the system time. |
| WM_TIMER | 0x113 | The WM_TIMER message is posted to the installing thread's message queue when a timer expires. The message is posted by the GetMessage or PeekMessage function. |
| WM_UNDO | 0x304 | An application sends a WM_UNDO message to an edit control to undo the last operation. When this message is sent to an edit control, the previously deleted text is restored or the previously added text is deleted. |
| WM_UNINITMENUPOPUP | 0x125 | The WM_UNINITMENUPOPUP message is sent when a drop-down menu or submenu has been destroyed. |
| WM_USER | 0x400 | The WM_USER constant is used by applications to help define private messages for use by private window classes, usually of the form WM_USER+X, where X is an integer value. |
| WM_USERCHANGED | 0x54 | The WM_USERCHANGED message is sent to all windows after the user has logged on or off. When the user logs on or off, the system updates the user-specific settings. The system sends this message immediately after updating the settings. |
| WM_VKEYTOITEM | 0x2E | Sent by a list box with the LBS_WANTKEYBOARDINPUT style to its owner in response to a WM_KEYDOWN message. |
| WM_VSCROLL | 0x115 | The WM_VSCROLL message is sent to a window when a scroll event occurs in the window's standard vertical scroll bar. This message is also sent to the owner of a vertical scroll bar control when a scroll event occurs in the control. |
| WM_VSCROLLCLIPBOARD | 0x30A | The WM_VSCROLLCLIPBOARD message is sent to the clipboard owner by a clipboard viewer window when the clipboard contains data in the CF_OWNERDISPLAY format and an event occurs in the clipboard viewer's vertical scroll bar. The owner should scroll the clipboard image and update the scroll bar values. |
| WM_WINDOWPOSCHANGED | 0x47 | The WM_WINDOWPOSCHANGED message is sent to a window whose size, position, or place in the Z order has changed as a result of a call to the SetWindowPos function or another window-management function. |
| WM_WINDOWPOSCHANGING | 0x46 | The WM_WINDOWPOSCHANGING message is sent to a window whose size, position, or place in the Z order is about to change as a result of a call to the SetWindowPos function or another window-management function. |
| WM_WININICHANGE | 0x1A | An application sends the WM_WININICHANGE message to all top-level windows after making a change to the WIN.INI file. The SystemParametersInfo function sends this message after an application uses the function to change a setting in WIN.INI. Note The WM_WININICHANGE message is provided only for compatibility with earlier versions of the system. Applications should use the WM_SETTINGCHANGE message. |
| WM_XBUTTONDBLCLK | 0x20D | The WM_XBUTTONDBLCLK message is posted when the user double-clicks the first or second X button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_XBUTTONDOWN | 0x20B | The WM_XBUTTONDOWN message is posted when the user presses the first or second X button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
| WM_XBUTTONUP | 0x20C | The WM_XBUTTONUP message is posted when the user releases the first or second X button while the cursor is in the client area of a window. If the mouse is not captured, the message is posted to the window beneath the cursor. Otherwise, the message is posted to the window that has captured the mouse. |
C# Constants:
private const UInt32 WM_ACTIVATE = 0x0006;
private const UInt32 WM_ACTIVATEAPP = 0x001C;
private const UInt32 WM_AFXFIRST = 0x0360;
private const UInt32 WM_AFXLAST = 0x037F;
private const UInt32 WM_APP = 0x8000;
private const UInt32 WM_ASKCBFORMATNAME = 0x030C;
private const UInt32 WM_CANCELJOURNAL = 0x004B;
private const UInt32 WM_CANCELMODE = 0x001F;
private const UInt32 WM_CAPTURECHANGED = 0x0215;
private const UInt32 WM_CHANGECBCHAIN = 0x030D;
private const UInt32 WM_CHANGEUISTATE = 0x0127;
private const UInt32 WM_CHAR = 0x0102;
private const UInt32 WM_CHARTOITEM = 0x002F;
private const UInt32 WM_CHILDACTIVATE = 0x0022;
private const UInt32 WM_CLEAR = 0x0303;
private const UInt32 WM_CLOSE = 0x0010;
private const UInt32 WM_COMMAND = 0x0111;
private const UInt32 WM_COMPACTING = 0x0041;
private const UInt32 WM_COMPAREITEM = 0x0039;
private const UInt32 WM_CONTEXTMENU = 0x007B;
private const UInt32 WM_COPY = 0x0301;
private const UInt32 WM_COPYDATA = 0x004A;
private const UInt32 WM_CREATE = 0x0001;
private const UInt32 WM_CTLCOLORBTN = 0x0135;
private const UInt32 WM_CTLCOLORDLG = 0x0136;
private const UInt32 WM_CTLCOLOREDIT = 0x0133;
private const UInt32 WM_CTLCOLORLISTBOX = 0x0134;
private const UInt32 WM_CTLCOLORMSGBOX = 0x0132;
private const UInt32 WM_CTLCOLORSCROLLBAR = 0x0137;
private const UInt32 WM_CTLCOLORSTATIC = 0x0138;
private const UInt32 WM_CUT = 0x0300;
private const UInt32 WM_DEADCHAR = 0x0103;
private const UInt32 WM_DELETEITEM = 0x002D;
private const UInt32 WM_DESTROY = 0x0002;
private const UInt32 WM_DESTROYCLIPBOARD = 0x0307;
private const UInt32 WM_DEVICECHANGE = 0x0219;
private const UInt32 WM_DEVMODECHANGE = 0x001B;
private const UInt32 WM_DISPLAYCHANGE = 0x007E;
private const UInt32 WM_DRAWCLIPBOARD = 0x0308;
private const UInt32 WM_DRAWITEM = 0x002B;
private const UInt32 WM_DROPFILES = 0x0233;
private const UInt32 WM_ENABLE = 0x000A;
private const UInt32 WM_ENDSESSION = 0x0016;
private const UInt32 WM_ENTERIDLE = 0x0121;
private const UInt32 WM_ENTERMENULOOP = 0x0211;
private const UInt32 WM_ENTERSIZEMOVE = 0x0231;
private const UInt32 WM_ERASEBKGND = 0x0014;
private const UInt32 WM_EXITMENULOOP = 0x0212;
private const UInt32 WM_EXITSIZEMOVE = 0x0232;
private const UInt32 WM_FONTCHANGE = 0x001D;
private const UInt32 WM_GETDLGCODE = 0x0087;
private const UInt32 WM_GETFONT = 0x0031;
private const UInt32 WM_GETHOTKEY = 0x0033;
private const UInt32 WM_GETICON = 0x007F;
private const UInt32 WM_GETMINMAXINFO = 0x0024;
private const UInt32 WM_GETOBJECT = 0x003D;
private const UInt32 WM_GETTEXT = 0x000D;
private const UInt32 WM_GETTEXTLENGTH = 0x000E;
private const UInt32 WM_HANDHELDFIRST = 0x0358;
private const UInt32 WM_HANDHELDLAST = 0x035F;
private const UInt32 WM_HELP = 0x0053;
private const UInt32 WM_HOTKEY = 0x0312;
private const UInt32 WM_HSCROLL = 0x0114;
private const UInt32 WM_HSCROLLCLIPBOARD = 0x030E;
private const UInt32 WM_ICONERASEBKGND = 0x0027;
private const UInt32 WM_IME_CHAR = 0x0286;
private const UInt32 WM_IME_COMPOSITION = 0x010F;
private const UInt32 WM_IME_COMPOSITIONFULL = 0x0284;
private const UInt32 WM_IME_CONTROL = 0x0283;
private const UInt32 WM_IME_ENDCOMPOSITION = 0x010E;
private const UInt32 WM_IME_KEYDOWN = 0x0290;
private const UInt32 WM_IME_KEYLAST = 0x010F;
private const UInt32 WM_IME_KEYUP = 0x0291;
private const UInt32 WM_IME_NOTIFY = 0x0282;
private const UInt32 WM_IME_REQUEST = 0x0288;
private const UInt32 WM_IME_SELECT = 0x0285;
private const UInt32 WM_IME_SETCONTEXT = 0x0281;
private const UInt32 WM_IME_STARTCOMPOSITION = 0x010D;
private const UInt32 WM_INITDIALOG = 0x0110;
private const UInt32 WM_INITMENU = 0x0116;
private const UInt32 WM_INITMENUPOPUP = 0x0117;
private const UInt32 WM_INPUTLANGCHANGE = 0x0051;
private const UInt32 WM_INPUTLANGCHANGEREQUEST = 0x0050;
private const UInt32 WM_KEYDOWN = 0x0100;
private const UInt32 WM_KEYFIRST = 0x0100;
private const UInt32 WM_KEYLAST = 0x0108;
private const UInt32 WM_KEYUP = 0x0101;
private const UInt32 WM_KILLFOCUS = 0x0008;
private const UInt32 WM_LBUTTONDBLCLK = 0x0203;
private const UInt32 WM_LBUTTONDOWN = 0x0201;
private const UInt32 WM_LBUTTONUP = 0x0202;
private const UInt32 WM_MBUTTONDBLCLK = 0x0209;
private const UInt32 WM_MBUTTONDOWN = 0x0207;
private const UInt32 WM_MBUTTONUP = 0x0208;
private const UInt32 WM_MDIACTIVATE = 0x0222;
private const UInt32 WM_MDICASCADE = 0x0227;
private const UInt32 WM_MDICREATE = 0x0220;
private const UInt32 WM_MDIDESTROY = 0x0221;
private const UInt32 WM_MDIGETACTIVE = 0x0229;
private const UInt32 WM_MDIICONARRANGE = 0x0228;
private const UInt32 WM_MDIMAXIMIZE = 0x0225;
private const UInt32 WM_MDINEXT = 0x0224;
private const UInt32 WM_MDIREFRESHMENU = 0x0234;
private const UInt32 WM_MDIRESTORE = 0x0223;
private const UInt32 WM_MDISETMENU = 0x0230;
private const UInt32 WM_MDITILE = 0x0226;
private const UInt32 WM_MEASUREITEM = 0x002C;
private const UInt32 WM_MENUCHAR = 0x0120;
private const UInt32 WM_MENUCOMMAND = 0x0126;
private const UInt32 WM_MENUDRAG = 0x0123;
private const UInt32 WM_MENUGETOBJECT = 0x0124;
private const UInt32 WM_MENURBUTTONUP = 0x0122;
private const UInt32 WM_MENUSELECT = 0x011F;
private const UInt32 WM_MOUSEACTIVATE = 0x0021;
private const UInt32 WM_MOUSEFIRST = 0x0200;
private const UInt32 WM_MOUSEHOVER = 0x02A1;
private const UInt32 WM_MOUSELAST = 0x020D;
private const UInt32 WM_MOUSELEAVE = 0x02A3;
private const UInt32 WM_MOUSEMOVE = 0x0200;
private const UInt32 WM_MOUSEWHEEL = 0x020A;
private const UInt32 WM_MOUSEHWHEEL = 0x020E;
private const UInt32 WM_MOVE = 0x0003;
private const UInt32 WM_MOVING = 0x0216;
private const UInt32 WM_NCACTIVATE = 0x0086;
private const UInt32 WM_NCCALCSIZE = 0x0083;
private const UInt32 WM_NCCREATE = 0x0081;
private const UInt32 WM_NCDESTROY = 0x0082;
private const UInt32 WM_NCHITTEST = 0x0084;
private const UInt32 WM_NCLBUTTONDBLCLK = 0x00A3;
private const UInt32 WM_NCLBUTTONDOWN = 0x00A1;
private const UInt32 WM_NCLBUTTONUP = 0x00A2;
private const UInt32 WM_NCMBUTTONDBLCLK = 0x00A9;
private const UInt32 WM_NCMBUTTONDOWN = 0x00A7;
private const UInt32 WM_NCMBUTTONUP = 0x00A8;
private const UInt32 WM_NCMOUSEMOVE = 0x00A0;
private const UInt32 WM_NCPAINT = 0x0085;
private const UInt32 WM_NCRBUTTONDBLCLK = 0x00A6;
private const UInt32 WM_NCRBUTTONDOWN = 0x00A4;
private const UInt32 WM_NCRBUTTONUP = 0x00A5;
private const UInt32 WM_NEXTDLGCTL = 0x0028;
private const UInt32 WM_NEXTMENU = 0x0213;
private const UInt32 WM_NOTIFY = 0x004E;
private const UInt32 WM_NOTIFYFORMAT = 0x0055;
private const UInt32 WM_NULL = 0x0000;
private const UInt32 WM_PAINT = 0x000F;
private const UInt32 WM_PAINTCLIPBOARD = 0x0309;
private const UInt32 WM_PAINTICON = 0x0026;
private const UInt32 WM_PALETTECHANGED = 0x0311;
private const UInt32 WM_PALETTEISCHANGING = 0x0310;
private const UInt32 WM_PARENTNOTIFY = 0x0210;
private const UInt32 WM_PASTE = 0x0302;
private const UInt32 WM_PENWINFIRST = 0x0380;
private const UInt32 WM_PENWINLAST = 0x038F;
private const UInt32 WM_POWER = 0x0048;
private const UInt32 WM_POWERBROADCAST = 0x0218;
private const UInt32 WM_PRINT = 0x0317;
private const UInt32 WM_PRINTCLIENT = 0x0318;
private const UInt32 WM_QUERYDRAGICON = 0x0037;
private const UInt32 WM_QUERYENDSESSION = 0x0011;
private const UInt32 WM_QUERYNEWPALETTE = 0x030F;
private const UInt32 WM_QUERYOPEN = 0x0013;
private const UInt32 WM_QUEUESYNC = 0x0023;
private const UInt32 WM_QUIT = 0x0012;
private const UInt32 WM_RBUTTONDBLCLK = 0x0206;
private const UInt32 WM_RBUTTONDOWN = 0x0204;
private const UInt32 WM_RBUTTONUP = 0x0205;
private const UInt32 WM_RENDERALLFORMATS = 0x0306;
private const UInt32 WM_RENDERFORMAT = 0x0305;
private const UInt32 WM_SETCURSOR = 0x0020;
private const UInt32 WM_SETFOCUS = 0x0007;
private const UInt32 WM_SETFONT = 0x0030;
private const UInt32 WM_SETHOTKEY = 0x0032;
private const UInt32 WM_SETICON = 0x0080;
private const UInt32 WM_SETREDRAW = 0x000B;
private const UInt32 WM_SETTEXT = 0x000C;
private const UInt32 WM_SETTINGCHANGE = 0x001A;
private const UInt32 WM_SHOWWINDOW = 0x0018;
private const UInt32 WM_SIZE = 0x0005;
private const UInt32 WM_SIZECLIPBOARD = 0x030B;
private const UInt32 WM_SIZING = 0x0214;
private const UInt32 WM_SPOOLERSTATUS = 0x002A;
private const UInt32 WM_STYLECHANGED = 0x007D;
private const UInt32 WM_STYLECHANGING = 0x007C;
private const UInt32 WM_SYNCPAINT = 0x0088;
private const UInt32 WM_SYSCHAR = 0x0106;
private const UInt32 WM_SYSCOLORCHANGE = 0x0015;
private const UInt32 WM_SYSCOMMAND = 0x0112;
private const UInt32 WM_SYSDEADCHAR = 0x0107;
private const UInt32 WM_SYSKEYDOWN = 0x0104;
private const UInt32 WM_SYSKEYUP = 0x0105;
private const UInt32 WM_TCARD = 0x0052;
private const UInt32 WM_TIMECHANGE = 0x001E;
private const UInt32 WM_TIMER = 0x0113;
private const UInt32 WM_UNDO = 0x0304;
private const UInt32 WM_UNINITMENUPOPUP = 0x0125;
private const UInt32 WM_USER = 0x0400;
private const UInt32 WM_USERCHANGED = 0x0054;
private const UInt32 WM_VKEYTOITEM = 0x002E;
private const UInt32 WM_VSCROLL = 0x0115;
private const UInt32 WM_VSCROLLCLIPBOARD = 0x030A;
private const UInt32 WM_WINDOWPOSCHANGED = 0x0047;
private const UInt32 WM_WINDOWPOSCHANGING = 0x0046;
private const UInt32 WM_WININICHANGE = 0x001A;
private const UInt32 WM_XBUTTONDBLCLK = 0x020D;
private const UInt32 WM_XBUTTONDOWN = 0x020B;
private const UInt32 WM_XBUTTONUP = 0x020C;
VB Constants:
Public Enum WndMsg
WM_ACTIVATE = &H6
WM_ACTIVATEAPP = &H1C
WM_AFXFIRST = &H360
WM_AFXLAST = &H37F
WM_APP = &H8000
WM_ASKCBFORMATNAME = &H30C
WM_CANCELJOURNAL = &H4B
WM_CANCELMODE = &H1F
WM_CAPTURECHANGED = &H215
WM_CHANGECBCHAIN = &H30D
WM_CHANGEUISTATE = &H127
WM_CHAR = &H102
WM_CHARTOITEM = &H2F
WM_CHILDACTIVATE = &H22
WM_CLEAR = &H303
WM_CLOSE = &H10
WM_COMMAND = &H111
WM_COMPACTING = &H41
WM_COMPAREITEM = &H39
WM_CONTEXTMENU = &H7B
WM_COPY = &H301
WM_COPYDATA = &H4A
WM_CREATE = &H1
WM_CTLCOLORBTN = &H135
WM_CTLCOLORDLG = &H136
WM_CTLCOLOREDIT = &H133
WM_CTLCOLORLISTBOX = &H134
WM_CTLCOLORMSGBOX = &H132
WM_CTLCOLORSCROLLBAR = &H137
WM_CTLCOLORSTATIC = &H138
WM_CUT = &H300
WM_DEADCHAR = &H103
WM_DELETEITEM = &H2D
WM_DESTROY = &H2
WM_DESTROYCLIPBOARD = &H307
WM_DEVICECHANGE = &H219
WM_DEVMODECHANGE = &H1B
WM_DISPLAYCHANGE = &H7E
WM_DRAWCLIPBOARD = &H308
WM_DRAWITEM = &H2B
WM_DROPFILES = &H233
WM_ENABLE = &HA
WM_ENDSESSION = &H16
WM_ENTERIDLE = &H121
WM_ENTERMENULOOP = &H211
WM_ENTERSIZEMOVE = &H231
WM_ERASEBKGND = &H14
WM_EXITMENULOOP = &H212
WM_EXITSIZEMOVE = &H232
WM_FONTCHANGE = &H1D
WM_GETDLGCODE = &H87
WM_GETFONT = &H31
WM_GETHOTKEY = &H33
WM_GETICON = &H7F
WM_GETMINMAXINFO = &H24
WM_GETOBJECT = &H3D
WM_GETTEXT = &HD
WM_GETTEXTLENGTH = &HE
WM_HANDHELDFIRST = &H358
WM_HANDHELDLAST = &H35F
WM_HELP = &H53
WM_HOTKEY = &H312
WM_HSCROLL = &H114
WM_HSCROLLCLIPBOARD = &H30E
WM_ICONERASEBKGND = &H27
WM_IME_CHAR = &H286
WM_IME_COMPOSITION = &H10F
WM_IME_COMPOSITIONFULL = &H284
WM_IME_CONTROL = &H283
WM_IME_ENDCOMPOSITION = &H10E
WM_IME_KEYDOWN = &H290
WM_IME_KEYLAST = &H10F
WM_IME_KEYUP = &H291
WM_IME_NOTIFY = &H282
WM_IME_REQUEST = &H288
WM_IME_SELECT = &H285
WM_IME_SETCONTEXT = &H281
WM_IME_STARTCOMPOSITION = &H10D
WM_INITDIALOG = &H110
WM_INITMENU = &H116
WM_INITMENUPOPUP = &H117
WM_INPUTLANGCHANGE = &H51
WM_INPUTLANGCHANGEREQUEST = &H50
WM_KEYDOWN = &H100
WM_KEYFIRST = &H100
WM_KEYLAST = &H108
WM_KEYUP = &H101
WM_KILLFOCUS = &H8
WM_LBUTTONDBLCLK = &H203
WM_LBUTTONDOWN = &H201
WM_LBUTTONUP = &H202
WM_MBUTTONDBLCLK = &H209
WM_MBUTTONDOWN = &H207
WM_MBUTTONUP = &H208
WM_MDIACTIVATE = &H222
WM_MDICASCADE = &H227
WM_MDICREATE = &H220
WM_MDIDESTROY = &H221
WM_MDIGETACTIVE = &H229
WM_MDIICONARRANGE = &H228
WM_MDIMAXIMIZE = &H225
WM_MDINEXT = &H224
WM_MDIREFRESHMENU = &H234
WM_MDIRESTORE = &H223
WM_MDISETMENU = &H230
WM_MDITILE = &H226
WM_MEASUREITEM = &H2C
WM_MENUCHAR = &H120
WM_MENUCOMMAND = &H126
WM_MENUDRAG = &H123
WM_MENUGETOBJECT = &H124
WM_MENURBUTTONUP = &H122
WM_MENUSELECT = &H11F
WM_MOUSEACTIVATE = &H21
WM_MOUSEFIRST = &H200
WM_MOUSEHOVER = &H2A1
WM_MOUSELAST = &H20D
WM_MOUSELEAVE = &H2A3
WM_MOUSEMOVE = &H200
WM_MOUSEWHEEL = &H20A
WM_MOUSEHWHEEL = &H20E
WM_MOVE = &H3
WM_MOVING = &H216
WM_NCACTIVATE = &H86
WM_NCCALCSIZE = &H83
WM_NCCREATE = &H81
WM_NCDESTROY = &H82
WM_NCHITTEST = &H84
WM_NCLBUTTONDBLCLK = &HA3
WM_NCLBUTTONDOWN = &HA1
WM_NCLBUTTONUP = &HA2
WM_NCMBUTTONDBLCLK = &HA9
WM_NCMBUTTONDOWN = &HA7
WM_NCMBUTTONUP = &HA8
WM_NCMOUSEMOVE = &HA0
WM_NCPAINT = &H85
WM_NCRBUTTONDBLCLK = &HA6
WM_NCRBUTTONDOWN = &HA4
WM_NCRBUTTONUP = &HA5
WM_NEXTDLGCTL = &H28
WM_NEXTMENU = &H213
WM_NOTIFY = &H4E
WM_NOTIFYFORMAT = &H55
WM_NULL = &H0
WM_PAINT = &HF
WM_PAINTCLIPBOARD = &H309
WM_PAINTICON = &H26
WM_PALETTECHANGED = &H311
WM_PALETTEISCHANGING = &H310
WM_PARENTNOTIFY = &H210
WM_PASTE = &H302
WM_PENWINFIRST = &H380
WM_PENWINLAST = &H38F
WM_POWER = &H48
WM_POWERBROADCAST = &H218
WM_PRINT = &H317
WM_PRINTCLIENT = &H318
WM_QUERYDRAGICON = &H37
WM_QUERYENDSESSION = &H11
WM_QUERYNEWPALETTE = &H30F
WM_QUERYOPEN = &H13
WM_QUEUESYNC = &H23
WM_QUIT = &H12
WM_RBUTTONDBLCLK = &H206
WM_RBUTTONDOWN = &H204
WM_RBUTTONUP = &H205
WM_RENDERALLFORMATS = &H306
WM_RENDERFORMAT = &H305
WM_SETCURSOR = &H20
WM_SETFOCUS = &H7
WM_SETFONT = &H30
WM_SETHOTKEY = &H32
WM_SETICON = &H80
WM_SETREDRAW = &HB
WM_SETTEXT = &HC
WM_SETTINGCHANGE = &H1A
WM_SHOWWINDOW = &H18
WM_SIZE = &H5
WM_SIZECLIPBOARD = &H30B
WM_SIZING = &H214
WM_SPOOLERSTATUS = &H2A
WM_STYLECHANGED = &H7D
WM_STYLECHANGING = &H7C
WM_SYNCPAINT = &H88
WM_SYSCHAR = &H106
WM_SYSCOLORCHANGE = &H15
WM_SYSCOMMAND = &H112
WM_SYSDEADCHAR = &H107
WM_SYSKEYDOWN = &H104
WM_SYSKEYUP = &H105
WM_TCARD = &H52
WM_TIMECHANGE = &H1E
WM_TIMER = &H113
WM_UNDO = &H304
WM_UNINITMENUPOPUP = &H125
WM_USER = &H400
WM_USERCHANGED = &H54
WM_VKEYTOITEM = &H2E
WM_VSCROLL = &H115
WM_VSCROLLCLIPBOARD = &H30A
WM_WINDOWPOSCHANGED = &H47
WM_WINDOWPOSCHANGING = &H46
WM_WININICHANGE = &H1A
WM_XBUTTONDBLCLK = &H20D
WM_XBUTTONDOWN = &H20B
WM_XBUTTONUP = &H20C
End Enum
Masm constants in numeric order:
WM_NULL equ 000h
WM_CREATE equ 001h
WM_DESTROY equ 002h
WM_MOVE equ 003h
WM_SIZE equ 005h
WM_ACTIVATE equ 006h
WM_SETFOCUS equ 007h
WM_KILLFOCUS equ 008h
WM_ENABLE equ 00Ah
WM_SETREDRAW equ 00Bh
WM_SETTEXT equ 00Ch
WM_GETTEXT equ 00Dh
WM_GETTEXTLENGTH equ 00Eh
WM_PAINT equ 00Fh
WM_CLOSE equ 010h
WM_QUERYENDSESSION equ 011h
WM_QUIT equ 012h
WM_QUERYOPEN equ 013h
WM_ERASEBKGND equ 014h
WM_SYSCOLORCHANGE equ 015h
WM_ENDSESSION equ 016h
WM_SHOWWINDOW equ 018h
WM_SETTINGCHANGE equ 01Ah
WM_WININICHANGE equ 01Ah
WM_DEVMODECHANGE equ 01Bh
WM_ACTIVATEAPP equ 01Ch
WM_FONTCHANGE equ 01Dh
WM_TIMECHANGE equ 01Eh
WM_CANCELMODE equ 01Fh
WM_SETCURSOR equ 020h
WM_MOUSEACTIVATE equ 021h
WM_CHILDACTIVATE equ 022h
WM_QUEUESYNC equ 023h
WM_GETMINMAXINFO equ 024h
WM_PAINTICON equ 026h
WM_ICONERASEBKGND equ 027h
WM_NEXTDLGCTL equ 028h
WM_SPOOLERSTATUS equ 02Ah
WM_DRAWITEM equ 02Bh
WM_MEASUREITEM equ 02Ch
WM_DELETEITEM equ 02Dh
WM_VKEYTOITEM equ 02Eh
WM_CHARTOITEM equ 02Fh
WM_SETFONT equ 030h
WM_GETFONT equ 031h
WM_SETHOTKEY equ 032h
WM_GETHOTKEY equ 033h
WM_QUERYDRAGICON equ 037h
WM_COMPAREITEM equ 039h
WM_GETOBJECT equ 03Dh
WM_COMPACTING equ 041h
WM_OTHERWINDOWCREATED equ 042h
WM_OTHERWINDOWDESTROYED equ 043h
WM_COMMNOTIFY equ 044h
WM_WINDOWPOSCHANGING equ 046h
WM_WINDOWPOSCHANGED equ 047h
WM_POWER equ 048h
WM_COPYDATA equ 04Ah
WM_CANCELJOURNAL equ 04Bh
WM_NOTIFY equ 04Eh
WM_INPUTLANGCHANGEREQUEST equ 050h
WM_INPUTLANGCHANGE equ 051h
WM_TCARD equ 052h
WM_HELP equ 053h
WM_USERCHANGED equ 054h
WM_NOTIFYFORMAT equ 055h
WM_CONTEXTMENU equ 07Bh
WM_STYLECHANGING equ 07Ch
WM_STYLECHANGED equ 07Dh
WM_DISPLAYCHANGE equ 07Eh
WM_GETICON equ 07Fh
WM_SETICON equ 080h
WM_NCCREATE equ 081h
WM_NCDESTROY equ 082h
WM_NCCALCSIZE equ 083h
WM_NCHITTEST equ 084h
WM_NCPAINT equ 085h
WM_NCACTIVATE equ 086h
WM_GETDLGCODE equ 087h
WM_SYNCPAINT equ 088h
WM_NCMOUSEMOVE equ 0A0h
WM_NCLBUTTONDOWN equ 0A1h
WM_NCLBUTTONUP equ 0A2h
WM_NCLBUTTONDBLCLK equ 0A3h
WM_NCRBUTTONDOWN equ 0A4h
WM_NCRBUTTONUP equ 0A5h
WM_NCRBUTTONDBLCLK equ 0A6h
WM_NCMBUTTONDOWN equ 0A7h
WM_NCMBUTTONUP equ 0A8h
WM_NCMBUTTONDBLCLK equ 0A9h
WM_NCXBUTTONDOWN equ 0ABh
WM_NCXBUTTONUP equ 0ACh
WM_NCXBUTTONDBLCLK equ 0ADh
WM_KEYFIRST equ 100h
WM_KEYDOWN equ 100h
WM_KEYUP equ 101h
WM_CHAR equ 102h
WM_DEADCHAR equ 103h
WM_SYSKEYDOWN equ 104h
WM_SYSKEYUP equ 105h
WM_SYSCHAR equ 106h
WM_SYSDEADCHAR equ 107h
WM_KEYLAST equ 108h
WM_UNICHAR equ 109h
WM_IME_STARTCOMPOSITION equ 10Dh
WM_IME_ENDCOMPOSITION equ 10Eh
WM_IME_COMPOSITION equ 10Fh
WM_IME_KEYLAST equ 10Fh
WM_INITDIALOG equ 110h
WM_COMMAND equ 111h
WM_SYSCOMMAND equ 112h
WM_TIMER equ 113h
WM_HSCROLL equ 114h
WM_VSCROLL equ 115h
WM_INITMENU equ 116h
WM_INITMENUPOPUP equ 117h
WM_MENUSELECT equ 11Fh
WM_MENUCHAR equ 120h
WM_ENTERIDLE equ 121h
WM_MENURBUTTONUP equ 122h
WM_MENUDRAG equ 123h
WM_MENUGETOBJECT equ 124h
WM_UNINITMENUPOPUP equ 125h
WM_MENUCOMMAND equ 126h
WM_CHANGEUISTATE equ 127h
WM_UPDATEUISTATE equ 128h
WM_QUERYUISTATE equ 129h
WM_CTLCOLORMSGBOX equ 132h
WM_CTLCOLOREDIT equ 133h
WM_CTLCOLORLISTBOX equ 134h
WM_CTLCOLORBTN equ 135h
WM_CTLCOLORDLG equ 136h
WM_CTLCOLORSCROLLBAR equ 137h
WM_CTLCOLORSTATIC equ 138h
WM_MOUSEFIRST equ 200h
WM_MOUSEMOVE equ 200h
WM_LBUTTONDOWN equ 201h
WM_LBUTTONUP equ 202h
WM_LBUTTONDBLCLK equ 203h
WM_RBUTTONDOWN equ 204h
WM_RBUTTONUP equ 205h
WM_RBUTTONDBLCLK equ 206h
WM_MBUTTONDOWN equ 207h
WM_MBUTTONUP equ 208h
WM_MOUSELAST equ 209h
WM_MBUTTONDBLCLK equ 209h
WM_MOUSEWHEEL equ 20Ah
WM_MOUSEHWHEEL equ 20Eh
WM_XBUTTONDOWN equ 20Bh
WM_XBUTTONUP equ 20Ch
WM_XBUTTONDBLCLK equ 20Dh
WM_PARENTNOTIFY equ 210h
WM_ENTERMENULOOP equ 211h
WM_EXITMENULOOP equ 212h
WM_NEXTMENU equ 213h
WM_SIZING equ 214h
WM_CAPTURECHANGED equ 215h
WM_MOVING equ 216h
WM_POWERBROADCAST equ 218h
WM_DEVICECHANGE equ 219h
WM_MDICREATE equ 220h
WM_MDIDESTROY equ 221h
WM_MDIACTIVATE equ 222h
WM_MDIRESTORE equ 223h
WM_MDINEXT equ 224h
WM_MDIMAXIMIZE equ 225h
WM_MDITILE equ 226h
WM_MDICASCADE equ 227h
WM_MDIICONARRANGE equ 228h
WM_MDIGETACTIVE equ 229h
WM_MDISETMENU equ 230h
WM_ENTERSIZEMOVE equ 231h
WM_EXITSIZEMOVE equ 232h
WM_DROPFILES equ 233h
WM_MDIREFRESHMENU equ 234h
WM_NCMOUSEHOVER equ 2A0h
WM_MOUSEHOVER equ 2A1h
WM_IME_SETCONTEXT equ 281h
WM_IME_NOTIFY equ 282h
WM_IME_CONTROL equ 283h
WM_IME_COMPOSITIONFULL equ 284h
WM_IME_SELECT equ 285h
WM_IME_CHAR equ 286h
WM_IME_REQUEST equ 288h
WM_IME_KEYDOWN equ 290h
WM_IME_KEYUP equ 291h
WM_MOUSEHOVER equ 2A1h
WM_NCMOUSELEAVE equ 2A2h
WM_MOUSELEAVE equ 2A3h
WM_WTSSESSION_CHANGE equ 2B1h
WM_TABLET_FIRST equ 2c0h
WM_TABLET_LAST equ 2dfh
WM_CUT equ 300h
WM_COPY equ 301h
WM_PASTE equ 302h
WM_CLEAR equ 303h
WM_UNDO equ 304h
WM_RENDERFORMAT equ 305h
WM_RENDERALLFORMATS equ 306h
WM_DESTROYCLIPBOARD equ 307h
WM_DRAWCLIPBOARD equ 308h
WM_PAINTCLIPBOARD equ 309h
WM_VSCROLLCLIPBOARD equ 30Ah
WM_SIZECLIPBOARD equ 30Bh
WM_ASKCBFORMATNAME equ 30Ch
WM_CHANGECBCHAIN equ 30Dh
WM_HSCROLLCLIPBOARD equ 30Eh
WM_QUERYNEWPALETTE equ 30Fh
WM_PALETTEISCHANGING equ 310h
WM_PALETTECHANGED equ 311h
WM_HOTKEY equ 312h
WM_PRINT equ 317h
WM_PRINTCLIENT equ 318h
WM_APPCOMMAND equ 319h
WM_THEMECHANGED equ 31Ah
WM_HANDHELDFIRST equ 358h
WM_HANDHELDLAST equ 35Fh
WM_AFXFIRST equ 360h
WM_AFXLAST equ 37Fh
WM_PENWINFIRST equ 380h
WM_PENWINLAST equ 38Fh
WM_USER equ 400h
Horizontal Scrolling Support for C++
#ifndef WM_MOUSEHWHEEL
#define WM_MOUSEHWHEEL 0x20E
#endif
Notes:
None.